mirror of https://gitlab.com/QEF/q-e.git
87 lines
2.4 KiB
Fortran
87 lines
2.4 KiB
Fortran
!
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! Copyright (C) 2002-2005 PWSCF group
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! This file is distributed under the terms of the
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! GNU General Public License. See the file `License'
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! in the root directory of the present distribution,
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! or http://www.gnu.org/copyleft/gpl.txt .
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!
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#include "f_defs.h"
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!
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!----------------------------------------------------------------------------
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SUBROUTINE input_from_file( )
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!
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! This subroutine checks program arguments and, if input file is present,
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! attach input unit ( 5 ) to the specified file
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!
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!
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IMPLICIT NONE
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!
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INTEGER :: unit = 5, &
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ilen, iiarg, nargs, ierr
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! do not define iargc as external: g95 does not like it
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INTEGER :: iargc
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CHARACTER (LEN=80) :: input_file
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!
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! ... Input from file ?
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!
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nargs = iargc()
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!
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DO iiarg = 1, ( nargs - 1 )
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!
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CALL getarg( iiarg, input_file )
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!
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IF ( TRIM( input_file ) == '-input' .OR. &
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TRIM( input_file ) == '-inp' .OR. &
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TRIM( input_file ) == '-in' ) THEN
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!
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CALL getarg( ( iiarg + 1 ) , input_file )
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!
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OPEN ( UNIT = unit, FILE = input_file, FORM = 'FORMATTED', &
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STATUS = 'OLD', IOSTAT = ierr )
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!
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CALL errore( 'input_from_file', 'input file ' // TRIM( input_file ) &
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& // ' not found' , ierr )
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!
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END IF
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!
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END DO
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END SUBROUTINE input_from_file
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!
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!----------------------------------------------------------------------------
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SUBROUTINE get_file( input_file )
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!
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! This subroutine reads, either from command line or from terminal,
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! the name of a file to be opened
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!
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IMPLICIT NONE
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!
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CHARACTER (LEN=*) :: input_file
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!
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CHARACTER (LEN=256) :: prgname
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! do not define iargc as external: g95 does not like it
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INTEGER :: nargs, iargc
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LOGICAL :: exst
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!
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nargs = iargc()
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CALL getarg (0,prgname)
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!
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IF ( nargs == 0 ) THEN
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10 PRINT '("Input file > ",$)'
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READ (5,'(a)', end = 20, err=20) input_file
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IF ( input_file == ' ') GO TO 10
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INQUIRE ( FILE = input_file, EXIST = exst )
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IF ( .NOT. exst) THEN
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PRINT '(A,": file not found")', TRIM(input_file)
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GO TO 10
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END IF
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ELSE IF ( nargs == 1 ) then
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CALL getarg (1,input_file)
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ELSE
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CALL errore( TRIM(prgname), 'too many arguments' , nargs )
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END IF
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RETURN
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20 CALL errore( TRIM(prgname), 'reading file name' , 1 )
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!
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END SUBROUTINE get_file
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